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Explanation: Suena a que se están refiriendo a una asociación/agrupación o lo que fuere, en cuyo caso yo lo dejaría tal cual. Salvo que nos proporciones un poco más de contexto para saber qué puede llegar a ser el Ex-Com.
Explanation: I agree with my previous colleague. This looks like an organization or association, etc. I would suggest you not to translate unless you have within the context clear which organization they are talking about.